最早的地雷是谁发明的?
参考答案:将戚继光
We don't know ________ it next. Let's go and ask Mr. Li. [ ]
A. what to do
B. to do what
C. whether to do
D. to do whether
治疗Curling溃疡出血的手术指征()
A.保守治疗无效
B.24小时内出血超过1000ml
C.12小时内出血超过2500ml
D.反复大出血
E.合并穿孔